RV Investigator Voyage IN2022_V03 Triaxus (undulating CTD) Data

This record describes the data (CTD, Dissolved Oxygen, Transmissometer, PAR, ECO Triplet, Nitrate, Fluorescence and LOPC) collected using the towed TRIAXUS platform on Investigator voyage IN2022_V03, titled: "SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania." The voyage took place between May 4, 2022 and May 15, 2022 (AEST), departing from Hobart and returning to Hobart.

Data for one Triaxus tow were acquired using Seabird’s Seasave acquisition software using the Seabird SBE911+ CTD #25. Sea-Bird and O&A Calibration lab supplied calibration factors were used to compute the pressure, preliminary conductivity, oxygen, and temperature values. The data was subjected to automated QC to remove spikes and out-of-range values.
A PAR, transmissometer, and SUNA sensors were also installed on the auxiliary A/D channels of the CTD. In addition to the auxiliary channels an ECO Triplet and LOPC were mounted on the Triaxus as attached payloads. A load cell sensor was also attached to the Triaxus mechanical termination.
The standard data product (1 decibar/10 second binned averaged) was produced using data from the secondary sensors to produce an along-track time-series dataset for each data recording file. These files were grouped into sections containing each Triaxus tow and in each tow, vertical casts were created with interpolated values from the along-track time-series binned dataset with a maximum interpolation distance of 1 cast/undulation. These generated the along-track and vertical cast section data products for each Triaxus tow.
An issue was identified at the start of deployment once the Triaxus was in water and the pumps switched on, where the salinity values were in significant disagreement and both showing unrealistic readings. It was determined that the connectors for the primary and secondary conductivity sensors had been swapped. This was corrected without recovery and redeployment of the Triaxus by swapping the calibration parameters. Further manual manipulation of the data was required during post-processing to match the physically co-located sensors for correct salinity and oxygen value calculations.

The collected data were processed (quality-controlled), and subsequently archived by the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC).

Additional information regarding this dataset may be contained in the Voyage Summary and the Data Processing Report.

本记录描述了在「调查船Investigator号航次IN2022_V03」中使用拖曳式TRIAXUS平台采集的数据（温盐深传感器（CTD）、溶解氧、透射仪、光合有效辐射（PAR）、ECO三联传感器（ECO Triplet）、硝酸盐、荧光及激光光学粒子计数器（LOPC）），数据集标题为："SOTS：塔斯马尼亚西南部用于气候与碳循环研究的南大洋时间序列自动锚系系统"。该航次于2022年5月4日至2022年5月15日（澳大利亚东部标准时间）开展，从霍巴特出发并返回霍巴特。

本次TRIAXUS拖曳航段的数据通过海鸟公司（Seabird）的Seasave采集软件，搭配海鸟SBE911+ CTD #25采集获取。采用海鸟与O&A校准实验室提供的校准系数，计算得到压力、初始电导率、溶解氧及温度数据。随后对数据执行自动化质量控制，以剔除尖峰与超限值。

CTD的辅助A/D通道还安装了光合有效辐射传感器（PAR）、透射仪与水下紫外硝酸盐分析仪（SUNA）。除辅助通道外，ECO三联传感器与激光光学粒子计数器（LOPC）作为附加载荷安装于TRIAXUS平台。此外，TRIAXUS的机械终端还加装了称重传感器。

标准数据产品采用1分巴/10秒分箱平均的格式，通过二次传感器数据生成每份数据记录文件的沿航迹时间序列数据集。将这些文件按单次TRIAXUS拖曳航段分组，在每次拖曳航段中，利用沿航迹时间序列分箱数据集的插值值生成垂直剖面数据，最大插值距离为1次剖面/一次起伏。由此生成单次TRIAXUS拖曳航段的沿航迹与垂直剖面分段数据产品。

在部署初期，当TRIAXUS入水并启动泵组后，发现盐度值存在显著偏差且均显示不合理读数。经排查，主与副电导率传感器的连接器接反。无需回收并重新部署TRIAXUS，仅通过调换校准参数即可完成修正。但在后处理阶段仍需对数据进行额外手动处理，以匹配共位安装的传感器，从而实现正确的盐度与溶解氧数值计算。

采集到的数据经过处理（质量控制）后，由澳大利亚联邦科学与工业研究组织（CSIRO）国家海洋数据与基础设施（NCMI）信息与数据中心（IDC）归档。

有关该数据集的更多信息可参阅航次总结报告与数据处理报告。